WO2000041924A1 - Ameliorations apportees a un systeme de direction - Google Patents

Ameliorations apportees a un systeme de direction Download PDF

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Publication number
WO2000041924A1
WO2000041924A1 PCT/AU1999/001095 AU9901095W WO0041924A1 WO 2000041924 A1 WO2000041924 A1 WO 2000041924A1 AU 9901095 W AU9901095 W AU 9901095W WO 0041924 A1 WO0041924 A1 WO 0041924A1
Authority
WO
WIPO (PCT)
Prior art keywords
compensating
vehicle
rotatable
rotatable means
wheels
Prior art date
Application number
PCT/AU1999/001095
Other languages
English (en)
Inventor
Alan Leslie Bidwell
Original Assignee
Igc (Australia) Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Igc (Australia) Pty. Ltd. filed Critical Igc (Australia) Pty. Ltd.
Priority to JP2000593511A priority Critical patent/JP2002534322A/ja
Priority to EP99964341A priority patent/EP1140603A1/fr
Priority to AU30265/00A priority patent/AU776052B2/en
Priority to KR1020017008720A priority patent/KR20010089807A/ko
Priority to MXPA01006989A priority patent/MXPA01006989A/es
Priority to BR9916855-3A priority patent/BR9916855A/pt
Priority to CA002359348A priority patent/CA2359348A1/fr
Publication of WO2000041924A1 publication Critical patent/WO2000041924A1/fr
Priority to HK02103894.9A priority patent/HK1042070B/zh
Priority to US10/666,073 priority patent/US20040056444A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/001—Steering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/06—Steering all wheels together simultaneously

Definitions

  • the invention relates to an improved steering system for a hand-propelled vehicle and refers particularly, though not exclusively, to an improved all-wheel steering system for such vehicles.
  • the present invention provides a compensating means for compensating for different wheel turn angles in a vehicle (as hereinbefore defined), the vehicle having a plurality of wheels at least two of which are operatively connected by a drive system (as hereinbefore defined) so as to turn simultaneously, the compensating means being adapted to be used with the drive system;
  • the compensating means including a first rotatable means for rotation about a central shaft, a second rotatable means for rotation about the central shaft, the first rotatable means and the second rotatable means being concentric, and a connecting means operatively connecting the first rotatable means and the second rotatable means for limited relative angular movement therebetween.
  • the vehicle is a supermarket trolley. More preferably, it has four wheels, all of which are linked by the drive system.
  • the drive system is in the form of a cable, belt, v-belt, chain, or the like.
  • the first rotatable means may be a cylindrical drum, as may be the second rotatable means.
  • the central shaft extends upwardly beyond the second rotatable means.
  • the connecting means may include a pin attached to the first rotatable means and extending upwardly through an elongate, arcuate slot in the second rotatable means. More preferably, the pin extends upwardly beyond the second rotatable means.
  • a biasing system including two generally parallel and spaced apart arms pivotally attached to the second rotatable means at one side thereof and extending beyond the opposite side, there being provided a spring operatively connecting the two arms, the central shaft and the pin being located between and acting upon and being acted upon by the two arms.
  • the compensating means be mounted to the vehicle by means of an arm pivotally attached to the vehicle and to the compensating means, the arm having a spring between it and the vehicle.
  • Figure 1 is a schematic top-plan view of the compensating means of the present invention
  • Figure 2 is a side view of the compensating means of Figure 1 ;
  • Figure 3 is a front view of the compensating means of Figures 1 and 2;
  • Figure 4 is an enlarged top-plan view of the compensating means of Figures 1 to 3;
  • Figure 5 is a front view corresponding to Figure 4.
  • Figure 6 is a view corresponding to Figure 1 showing the respective angles when a left turn is being undertaken;
  • Figure 7 is a view corresponding to Figure 6 but without the angles indicated, and showing a sharp left turn;
  • Figure 8 is a view corresponding to Figure 7 but showing independent wheel movement
  • Figure 9 is a top-plan view of a second embodiment of the present invention.
  • Figure 10 is an end view of the embodiment of Figure 9;
  • Figure 11 shows the embodiment of Figures 9 and 10 in a left turn position
  • Figure 12 is a view corresponding to Figure 11 but in a right turn position.
  • FIG. 10 a vehicle generally designated as 10 and which in this instance is to represent a common device such as a supermarket trolley.
  • the vehicle 10 has four wheels 12, 14, 16 and 18 each mounted on a vertical swivel or castor axle 20 and which is concentric with and attached to a gear or drum 22. Two further idler gears 24, 26 are provided. A compensating means generally designated as 28 is also included. A continuous belt 30 passes around the gears 22, 24, 26 as well as the compensating means 28 (as will be described below) such that a four-wheel steering is created in accordance with our earlier Application.
  • the belt 30 is preferably a form of belt having a number of evenly-spaced openings 32 along its length, with the gears 22, 24, 26 having projections 34 to engage in openings 32 so that the belt 30 can drive gears 22, 24, 26, and via versa. In this way, rotation of any one wheel 12, 14, 16, 18 about its castor axle 20 will cause movement of the belt 30 by means of the gear 22 for that particular wheel, and this will cause the other gears 22, 24, 26 to also rotate to effect steering.
  • FIG. 1 there is shown in some detail the compensating means 28.
  • an arm 36 which at one end 38 is pivotally attached to the vehicle 10 by means of a pivot pin 40.
  • a central shaft 44 At its other end 42 mounted on the arm 36 in a secure manner is a central shaft 44.
  • a first rotating means 46 which, as shown, is a cylindrical drum of greater diameter than height. In this instance, the height of the first rotating means 46 is slightly greater than the height of the belt 30.
  • the first rotating means 46 has a number of projections 34 which are adapted to engage at openings 32 on belt 30. Therefore, movement of belt 30 will cause a rotation of first rotating means 46, and vice versa.
  • second rotating means 48 which is generally the same as first rotating means 46, although this need not always be the case.
  • the shaft 44 extends upwardly above the upper surface 50 of second rotating means 48.
  • the second rotating means 48 also has a number of projections 34 which engage in openings 32 of belt 30. Therefore, similarly, movement of belt 30 will cause movement of second rotating means 48, and vice versa. It is to be noted from figures 1 to 5 that the belt 30 passes around first rotating means 46 in the opposite way to that of second rotating means 48.
  • Pin 52 Securely attached to first rotating means 46 and extending upwardly therefrom is a pin 52.
  • Pin 52 passes through an elongate, arcuate slot 54 in second rotating means 48.
  • the slot 54 has a first end 56 and second end 58.
  • the pin 52 projects upwardly beyond the upper surface 50 of second rotating means 48.
  • the arm 60, 62 pivotally attached thereto by pivot pins 64.
  • the arm 60, 62 extend across the substantial portion of the upper surface 50 and beyond the circumference of second rotating means 48.
  • the two arms 60, 62 have an upwardly extending lug 68 to which is connected one end of a spring 70.
  • Located between the arms 60, 62 is the upper end of central shaft 44 and pin 52.
  • the arm 36 is biased relative to the vehicle by means of a second spring 72.
  • the radius of curvature for the wheels 12, 18 will be quite different to that of the wheels 14, 16.
  • the radius of curvature for the wheel 12 is 1.53 metres - a fairly common radius in a supermarket situation.
  • that radius of curvature would also pass through the castor axle 20 of wheel 18.
  • the radius of curvature for wheel 14 is 2.12 metres, for a standard supermarket trolley. That means that the angle of turn required for wheel 14 will be different to the angle of turn required for wheel 12.
  • the angle required for wheel 12 compared to the longitudinal axis, is 16 degrees.
  • a similar angle of 1 1 degrees is required for wheel 16, and again an angle of 16 degrees is required for wheel 18.
  • the degree of difference in the relative movement will vary according to the lengths of arm 60, 62 and in particular to the respective distances between pin 64 to central shaft 44, and central shaft 44 to the upper end 66 of the arm 60, 62. Also of significance is the tensile strength of spring 70.
  • the extent of movement means that the resistance of the spring 70 is substantially overcome, and thus the second rotating means 48 will rotate about central shaft 44 by almost as much as first rotating means 46.
  • the difference in angle between wheels 14, 16 as against wheels 12, 18 will be less as a percentage of the total angular movement.
  • a difference of 5 degrees in 16 is a far greater percentage than a difference of 6 degrees in 45 degrees.
  • FIG 8 there is shown the difficulty than can occur when one wheel (in this instance wheel 12) is subjected to sudden, sharp movement such as by a pot hole, crack or the like.
  • the resistance in spring 70 is substantially overcome such that the wheels 14, 16 remains substantially straight-ahead, yet wheels 12, 18 can move to the relevant position.
  • wheels 12, 18 will return to the straight-ahead position.
  • Spring 72 assists in maintaining tension on the belt 30 at all times, and can also act as a shock-absorber in the event of sudden impact upon one or more of the wheels.
  • a vehicle 210 having four wheels 212, 214, 216 and 218.
  • Each of the wheels is mounted to the vehicle 210 by a cast or axle 220.
  • the wheels 212, 218 are arranged as a front and rear pair and the wheels 214, 216 are arranged as a front and rear pair.
  • a compensating means 228 is placed between wheels 212, 214.
  • Each of the wheels 212, 214, 216, 218 has a larger diameter disc 274 and a smaller diameter disc 276.
  • the larger diameter discs 274 are above the smaller diameter discs 276, and contact each other. In this way, if wheel 212 moves to the right, wheel 218 turns to the left.
  • the wheels 214, 216 except that their smaller diameter disc 276 is above the larger diameter disc 274, but the larger diameter discs 274 still contact each other such that the same reverse angle movement occurs.
  • the compensating means 228 operates the same as the compensating means 28.
  • the invention is not limited to the drive arrangements as shown in the two embodiments, and any form of drive arrangement may be used, including a chain, or other suitable device. Furthermore, there may be less than the four wheels illustrated, with the invention also being suitable for three wheeled, or more than four wheel steering systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Abstract

L'invention concerne un système de correction (28), destiné à corriger les différents angles de braquage de roue d'un véhicule présentant plusieurs roues (12, 14, 16, 18). Au moins deux des roues (12, 14) sont reliées entre elles, de manière fonctionnelle, par un système d'entraînement (22, 30), de façon à tourner simultanément. Ledit système de correction est conçu pour être utilisé avec ledit système d'entraînement. Ce système de correction (28) comprend un premier système rotatif (46), entrant en rotation autour d'un arbre central (44), et un second système rotatif (48), entrant en rotation autour dudit arbre central (44), ces deux systèmes rotatifs (46, 48) étant concentriques. Un système de connexion (52, 54) relie, de manière fonctionnelle, les deux systèmes rotatifs (46, 48), et ce, afin de limiter le mouvement angulaire relatif entre les deux systèmes.
PCT/AU1999/001095 1999-01-11 1999-12-09 Ameliorations apportees a un systeme de direction WO2000041924A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP2000593511A JP2002534322A (ja) 1999-01-11 1999-12-09 改良された操舵システム
EP99964341A EP1140603A1 (fr) 1999-01-11 1999-12-09 Ameliorations apportees a un systeme de direction
AU30265/00A AU776052B2 (en) 1999-01-11 1999-12-09 Improved steering system
KR1020017008720A KR20010089807A (ko) 1999-01-11 1999-12-09 개선된 조향 시스템
MXPA01006989A MXPA01006989A (es) 1999-01-11 1999-12-09 Sistema de direccion mejorado.
BR9916855-3A BR9916855A (pt) 1999-01-11 1999-12-09 Sistema de direção aperfeiçoado
CA002359348A CA2359348A1 (fr) 1999-01-11 1999-12-09 Ameliorations apportees a un systeme de direction
HK02103894.9A HK1042070B (zh) 1999-01-11 2002-05-24 改進型轉向系統
US10/666,073 US20040056444A1 (en) 1999-01-11 2003-09-19 Steering system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP8067 1999-01-11
AUPP8067A AUPP806799A0 (en) 1999-01-11 1999-01-11 Improved steering system

Publications (1)

Publication Number Publication Date
WO2000041924A1 true WO2000041924A1 (fr) 2000-07-20

Family

ID=3812272

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/001095 WO2000041924A1 (fr) 1999-01-11 1999-12-09 Ameliorations apportees a un systeme de direction

Country Status (13)

Country Link
US (1) US20040056444A1 (fr)
EP (1) EP1140603A1 (fr)
JP (1) JP2002534322A (fr)
KR (1) KR20010089807A (fr)
CN (1) CN1128735C (fr)
AU (2) AUPP806799A0 (fr)
BR (1) BR9916855A (fr)
CA (1) CA2359348A1 (fr)
HK (1) HK1042070B (fr)
MX (1) MXPA01006989A (fr)
RU (1) RU2222453C2 (fr)
WO (1) WO2000041924A1 (fr)
ZA (1) ZA200105571B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITNA20110008A1 (it) * 2011-02-02 2012-08-03 Nicolina Zotti Carrello per operatori dei vari settori dell'edilizia trazionato da motore a batteria con avantreno sterzante
EP2384950A3 (fr) * 2010-05-07 2014-07-09 Blickle Räder + Rollen GmbH & Co.KG Chariot de transport
EP3268258B1 (fr) 2015-03-10 2019-04-03 Tellure Rôta S.p.A. Chariot de transport avec volants

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60208697D1 (de) * 2001-09-05 2006-04-06 Hill Rom Services Inc Verbindungsvorrichtung für ein krankenbett
NL1027035C2 (nl) * 2004-09-14 2006-03-15 Henricus Hubertus Ploegmakers Transportwagen.
BE1019512A4 (nl) * 2010-09-21 2012-08-07 Renders Sa Stuurinrichting van een getrokken voertuig voor het aansturen van een of meerdere verdraaibaar gestuurde wielassen.
US9033352B2 (en) * 2011-11-22 2015-05-19 Husqvarna Ab Yard maintenance vehicle with cable steering assembly
EP2825439B1 (fr) * 2012-03-15 2017-10-18 Husqvarna AB Véhicule de maintenance de chantier doté d'un ensemble de direction par câble pour virage serré
RS54946B1 (sr) * 2013-02-06 2016-11-30 Comau Spa Kolica za prenos kontejnera za delove ili komponente u industrijskom postrojenju
CN103661571A (zh) * 2013-12-09 2014-03-26 镇江新区惠聚机电科技有限公司 车用整圆周转向机构
CN108116164A (zh) * 2018-01-29 2018-06-05 南通明诺电动科技股份有限公司 一种用于扫地机的爬坡补偿装置
JP7256454B2 (ja) * 2019-06-12 2023-04-12 株式会社豊田自動織機 全方向移動体
CN110356444B (zh) * 2019-08-13 2020-08-18 张楼锋 一种医用手推车
CN111688773B (zh) * 2019-08-13 2021-07-16 张楼锋 一种医疗领域用的推车
CN111319670B (zh) * 2020-04-22 2024-05-10 扬州工业职业技术学院 一种多功能婴儿车
JP6808884B1 (ja) * 2020-07-27 2021-01-06 Dmg森精機株式会社 無人搬送車
CN112874605B (zh) * 2021-01-27 2021-12-14 德州职业技术学院 一种建筑施工用搬运装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU761343A1 (ru) * 1977-08-29 1980-09-07 Boris S Bosnik Механизм рулевого управления транспортного средства 1
US4515380A (en) * 1982-06-22 1985-05-07 Ernst Wagner KG-Fordertechnik Vehicle with two steerable wheels
DE3514638A1 (de) * 1985-02-15 1986-10-30 Argus-Film GmbH, 8000 München Vierraedriger wagen mit einem wagenkoerper, insbesondere von hand zu schiebender filmkamerawagen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2216800A1 (fr) * 1973-02-06 1974-08-30 Semat Equip Manutentions Trans
US4950126A (en) * 1988-04-05 1990-08-21 Kestrel International, Ltd. Movie equipment dolly
CN2074273U (zh) * 1990-08-27 1991-04-03 齐裕 手推车
CN2138069Y (zh) * 1992-09-29 1993-07-14 蔡诚献 轻巧型工具手推车

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU761343A1 (ru) * 1977-08-29 1980-09-07 Boris S Bosnik Механизм рулевого управления транспортного средства 1
US4515380A (en) * 1982-06-22 1985-05-07 Ernst Wagner KG-Fordertechnik Vehicle with two steerable wheels
DE3514638A1 (de) * 1985-02-15 1986-10-30 Argus-Film GmbH, 8000 München Vierraedriger wagen mit einem wagenkoerper, insbesondere von hand zu schiebender filmkamerawagen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2384950A3 (fr) * 2010-05-07 2014-07-09 Blickle Räder + Rollen GmbH & Co.KG Chariot de transport
ITNA20110008A1 (it) * 2011-02-02 2012-08-03 Nicolina Zotti Carrello per operatori dei vari settori dell'edilizia trazionato da motore a batteria con avantreno sterzante
EP3268258B1 (fr) 2015-03-10 2019-04-03 Tellure Rôta S.p.A. Chariot de transport avec volants

Also Published As

Publication number Publication date
EP1140603A1 (fr) 2001-10-10
CA2359348A1 (fr) 2000-07-20
MXPA01006989A (es) 2002-09-18
RU2222453C2 (ru) 2004-01-27
CN1333723A (zh) 2002-01-30
KR20010089807A (ko) 2001-10-08
JP2002534322A (ja) 2002-10-15
US20040056444A1 (en) 2004-03-25
HK1042070A1 (en) 2002-08-02
ZA200105571B (en) 2002-02-27
AU3026500A (en) 2000-08-01
AUPP806799A0 (en) 1999-02-04
HK1042070B (zh) 2004-02-27
CN1128735C (zh) 2003-11-26
BR9916855A (pt) 2001-10-09
AU776052B2 (en) 2004-08-26

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